22 COQUILLETT 



each bearing a hook-like process on the under side a short distance be- 

 fore the apex, curved backward and covered with short hairs, while 

 beyond it are two, bare, pimple-like swellings; on the inner side of 

 the femora nearer its apex is a fringe of about five rather short spinous 

 bristles; hind tibia? of male each bearing a bare, slightly arcuate proc- 

 ess on the outer side near the base, while opposite it, on the inner 

 side, is a low prominence beset with short bristly hairs; legs of female 

 simple, not fringed with scales; wings grayish hyaline, stigma brown, 

 veins brown, normal. Length 5 to 7 mm. Seventeen males and four- 

 teen females. 



Habitat. Yakutat, June 21 ; Popof Island, July S to 12; Kadiak, 

 Alaska, July 20. 



Type. Cat. no. 5209, U. S. National Museum. 



Empis laniventris Eschscholz. 



Empis lanivoitris EscHSCHOLZ, Entomographien, I, p. 113, 1823. 



Popof Island, Alaska : Seventy-eight specimens, collected from 

 July 10 to 15. Originally described from Alaska. 



Empis virgata Coquillett 



Empis virgata COQUILLETT, Proc. U. S. National Museum, p. 408, 1896. 



Sitka, June 16; Yakutat, June 21; Saldovia, Alaska, July 21 : 

 Seventy specimens. This species was heretofore known only from 

 Washington. 



Empis pellucida sp. nov. 



Black, the palpi and horny part of proboscis, except its base, yellow, 

 halteres yellowish white, bases of tibiae sometimes reddish yellow ; eyes 

 of male more widely separated than the posterior ocelli ; third joint of 

 antennas rather broad, gradually tapering to the apex, about five times 

 as long as the style, proboscis twice as long as height of head ; hairs 

 and bristles of body and legs black; mesonotum slightly polished, 

 marked with a median, light gray pruinose vitta, the lateral margins 

 and pleura gray pruinose ; scutellum bearing four bristles ; abdomen 

 highly polished, hvpopygium of male small, almost bare, obliquely 

 ascending, destitute of elongate processes, central filament robust, rap- 

 idly tapering toward the apex, arcuate, free except its apex; hind 

 margin of fifth abdominal segment ventrally fringed with spinous bris- 

 tles, many of which are as long as this segment; legs in both sexes 

 simple, first joint of hind tarsi slightly thicker than that of the front 

 ones, hind femora spinose on the under side ; wings hyaline, veins dark 

 brown, normal, stigma brown. Length 6 mm. Three males and two 

 females. 



